JP2010099864A - Mist collecting device and liquid jetting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mist collecting device which can surely collect mist generated inside a liquid jetting apparatus while maintaining the quality of printing to a target, and to provide a liquid jetting apparatus equipped with the mist collecting device. <P>SOLUTION: The mist collecting device includes a platen 27 wherein the supporting surface capable of supporting a recording paper 12 is arranged so as to be located opposite to the nozzle forming surface of a unit head 23 and wherein a long hole 28 capable of generating a negative pressure when being sucked is opened on the supporting surface, a negative pressure chamber communicated with the long hole 28 of the platen 27, and an inducing fan 33 for sucking the ink mist which is generated between the unit head 23 and the platen 27 due to the ink jetting from the nozzle into the negative pressure chamber through the long hole 28 by generating a negative pressure inside the negative pressure chamber. The long hole 28 is formed so as to be opened in the position opposite to the nozzle in the ink discharging direction from the nozzle of the unit head 23 in the supporting surface of the platen 27. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mist collecting apparatus for collecting mist generated in a liquid ejecting apparatus, and a liquid ejecting apparatus including the mist collecting apparatus.

  In general, an ink jet printer (hereinafter simply referred to as “printer”) is widely known as a liquid ejecting apparatus that ejects ink (liquid) from a nozzle of a recording head (liquid ejecting head) to a target. In such a printer, some of the ink droplets ejected from the recording head do not land on the target supported on the platen, but become minute ink particles (so-called ink mist) and scatter in the printer frame. Could contaminate the frame. Therefore, recently, a printer including an ink mist collection device for collecting ink mist generated in a frame has been proposed (for example, see Patent Document 1).

That is, in the printer described in Patent Document 1, the conveyor belt devices for conveying the target are arranged on both sides of the target in the conveyance direction adjacent to the platen. An air suction device (ink mist collection device) having a suction port on the side surface on the platen side is disposed below each conveyor belt device. When the suction fan is driven, the ink mist staying between the recording head and the platen is sucked downward through the gap between the platen and the conveyor belt device, and then is sucked into the air suction device through the suction port. It has come to be collected.
JP 2004-262147 A

  By the way, in the printer described in Patent Document 1, each air suction device has a configuration in which suction force is applied to both sides of the target transport direction on the ink mist staying between the recording head and the platen. ing. Therefore, when sucking the ink mist staying between the recording head and the platen, it is necessary to apply a suction force through a narrow slit-shaped space between the recording head and the platen. There is a possibility that a sufficient air flow cannot be generated due to excessive resistance. On the other hand, when the suction force of the suction fan is increased so as to generate a sufficient air flow up to the center of the narrow slit-shaped space between the recording head and the platen, the slit-shaped space An excessive suction force acts on both ends of the area to generate a high-speed air flow, which may change the flying direction of the ink ejected from the recording head and reduce the print quality.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a mist collecting apparatus capable of reliably collecting mist generated in a liquid ejecting apparatus while maintaining print quality for a target. And a liquid ejecting apparatus including the mist collecting apparatus.

  In order to achieve the above object, a mist collecting apparatus of the present invention is a mist collecting apparatus provided in a liquid ejecting apparatus including a liquid ejecting head that ejects liquid from a nozzle formed on a nozzle forming surface to a target. The support surface capable of supporting the target is disposed so as to face the nozzle forming surface, and a suction hole capable of generating a negative pressure when sucked is formed on the support surface. A support member, a negative pressure chamber communicating with the suction hole of the support member, and generating a negative pressure in the negative pressure chamber, whereby the liquid ejecting head and the support member are based on liquid ejection from the nozzle Suction means for sucking the mist generated between the nozzle and the suction hole into the negative pressure chamber, and the suction hole is formed on the support surface in the direction of discharge of the liquid from the nozzle. It is formed so as to open at a position facing against.

  According to the above configuration, the suction force from the suction means acts on the mist in which the liquid ejected from the nozzle of the liquid jet head is in the form of a mist through the suction hole of the support member along the ejection direction. . Therefore, compared with the case where the suction force from the suction unit is applied along the target transport direction through the narrow space between the liquid ejecting head and the support member, the space between the liquid ejecting head and the support member is smaller. By reducing the air resistance when the mist staying in the flow is reduced, the mist can be sucked at a low speed and a large air volume. Therefore, there is almost no change in the flying direction of the liquid ejected from the liquid ejecting head with the suction drive of the suction means, and the mist generated in the liquid ejecting apparatus is maintained while maintaining the print quality for the target. It can be reliably recovered.

  In the mist collecting apparatus according to the aspect of the invention, the liquid ejecting head may include a plurality of unit heads arranged in a staggered manner so as to face the support surface of the support member, and the suction hole may include the support member. An opening is formed in the support surface in a manner partitioned so as to individually correspond to the plurality of unit heads.

  According to the above configuration, the suction holes are distributed and formed on the support surface of the support member. Therefore, when a target is conveyed on the support surface of a support member, a support member disperses and supports the whole area of a target. Therefore, when the suction force from the suction means acts on the target through the suction hole, the printing on the target is suppressed by suppressing the printing surface of the target from being recessed into the negative pressure chamber side through the suction hole. Quality can be maintained.

  Further, in the mist collecting apparatus of the present invention, the negative pressure chamber is configured such that a bottom wall portion positioned below in the direction of gravity is inclined with respect to the horizontal direction, and in the direction of gravity in the bottom wall portion. A waste liquid recovery unit for recovering the liquid sucked into the negative pressure chamber is provided at a position at the lowest position.

  According to the above configuration, when liquid is discharged from the nozzle of the liquid ejecting head into the negative pressure chamber through the suction hole of the support member, the liquid is lowered in the gravity direction along the bottom wall portion of the negative pressure chamber. To flow down. As a result, the liquid ejected from the liquid jet head into the negative pressure chamber is concentrated at the lowest position in the direction of gravity in the bottom wall of the negative pressure chamber, and then efficiently recovered as waste liquid by the waste liquid recovery unit. be able to.

In the mist collecting apparatus of the present invention, the suction means communicates with an upper region in the gravity direction in the negative pressure chamber.
According to the above configuration, when liquid is discharged from the nozzle of the liquid ejecting head into the negative pressure chamber through the suction hole, the position is spaced upward in the direction of gravity from the bottom wall portion of the negative pressure chamber where the liquid is deposited. The suction means is in communication with. Therefore, the suction means can collect the mist dispersed in the entire area of the negative pressure chamber out of the liquid staying in the negative pressure chamber separately from the liquid deposited on the bottom wall portion of the negative pressure chamber.

  Further, in the mist collecting apparatus of the present invention, a mist suction hole for sucking the mist into the negative pressure chamber communicates with the support surface of the support member from the nozzle in the negative pressure chamber. An opening is formed at a position different from the position facing the nozzle in the liquid ejection direction.

  According to the above configuration, even when the suction hole of the support member is sealed, the mist generated between the liquid ejecting head and the support member is collected in the negative pressure chamber through the mist suction hole. The Therefore, it is possible to newly provide a member appropriately disposed in the suction hole of the support member, and the degree of freedom in designing the mist collecting device can be increased.

  In the mist collecting apparatus according to the aspect of the invention, the mist collecting apparatus includes an opening disposed to face the nozzle of the liquid ejecting head, and discharges as waste liquid from the nozzle of the liquid ejecting head through the opening. A liquid receiver capable of receiving the liquid that has been discharged and passing through the suction hole from the negative pressure chamber and moving toward and away from the nozzle forming surface of the liquid jet head; and The liquid receiver is configured to receive the liquid discharged from the nozzle of the liquid ejecting head, the first position where the opening seals the nozzle of the liquid ejecting head, and the opening of the suction hole. Between a second position that is separated from the liquid ejecting head to the negative pressure chamber side with respect to the edge, and a third position that is separated from the liquid ejecting head to the negative pressure chamber side with respect to the second position. Displacement machine to displace Door further comprising: a.

  According to the above configuration, when the liquid receiver is disposed at the second position where the distance between the opening of the liquid container and the nozzle formation surface of the liquid ejecting head is relatively small, the displacement mechanism The liquid ejected as the waste liquid from the nozzle of the head can be prevented from being contaminated by colliding with the bottom surface of the opening of the liquid container and scattering. On the other hand, when the liquid receiver is disposed at a third position where the gap between the opening of the liquid receptor and the suction hole of the support member is relatively large, the displacement mechanism can be moved from the suction hole of the support member to the gap. The flow path resistance of air flowing into the negative pressure chamber through is reduced. Therefore, the suction means can more efficiently recover the mist staying between the liquid ejecting head and the support member by sucking high air volume air through the suction holes.

  The mist collecting apparatus according to the present invention further includes suction force adjusting means for adjusting suction force of the suction means with respect to the negative pressure chamber, wherein the suction force adjusting means is configured such that the target is on the support surface of the support member. The suction force of the suction means is adjusted so that the suction force applied to the target through the suction hole becomes a first suction force capable of maintaining the flatness of the target. In addition, when the target is not disposed on the support surface of the support member, the suction force of the suction means is adjusted to be a second suction force stronger than the first suction force. To do.

  According to the above configuration, when the target is not disposed on the support surface of the support member, the suction means has a stronger first suction force than the first suction force for attracting the target onto the support surface of the support member. Since the suction force is applied to the mist staying between the liquid jet head and the support member through the suction hole so that the suction force becomes 2, the mist can be collected more efficiently.

The liquid ejecting apparatus of the present invention includes a liquid ejecting head that ejects liquid from a nozzle formed on a nozzle forming surface to a target, and the mist collecting apparatus having the above-described configuration.
According to the said structure, the effect similar to invention of the said mist collection | recovery apparatus is acquired.

(First embodiment)
A first embodiment in which the present invention is embodied in an ink jet printer (hereinafter referred to as “printer”) will be described below with reference to FIGS. In the following description, the terms “front-rear direction”, “left-right direction”, and “up-down direction” refer to directions indicated by arrows in the drawings.

  As shown in FIGS. 1 and 2, a printer 11 as a liquid ejecting apparatus includes a belt conveyance device 13 for conveying a recording paper 12 as a target. The belt conveyance device 13 includes a driven roller 14 provided on the upstream side (right side in FIG. 1) of the recording paper 12 and a drive provided on the downstream side (left side in FIG. 1) of the recording paper 12 in the conveyance direction. A roller 15, a driven roller 14, and a tension roller 16 disposed slightly below the substantially central position of the driving roller 15 are provided. An endless transport belt 17 is wound around each of the rollers 14 and 15 so as to surround the rollers 14 and 15. The conveyor belt 17 rotates in a counterclockwise direction when viewed from the front side of the driving roller 15, the tension roller 16, and the driven roller 14 when the driving roller 15 is driven to rotate, thereby causing the conveyor belt 17 to rotate. The recording paper 12 placed thereon is conveyed from the right side, which is the upstream side, to the left side, which is the downstream side.

  A charging roller 18 is arranged below the driven roller 14 in a state of being pressed against the driven roller 14 via the conveying belt 17 by being biased toward the driven roller 14 by a spring 19. Further, the charging roller 18 is connected to the power source 20, and the charge on the conveying belt 17 is charged by the charging roller 18, so that the recording paper 12 is electrostatically attracted by the charge on the conveying belt 17. ing.

  A recording head 22 as a liquid ejecting head that performs printing processing by ejecting ink as a liquid onto the recording paper 12 fed through the gate roller 21 is disposed on the upstream side of the belt conveyance device 13. It is installed. The recording head 22 is composed of a plurality (seven in this embodiment) of unit heads 23 having a rectangular shape in plan view. Each unit head 23 is connected to a plurality of (four in the present embodiment) ink cartridges 25 via the ink supply tube 24, so that a plurality of different colors of ink are supplied from each ink cartridge 25 to each unit. It is supplied to the head 23.

  Further, the lower surface of each unit head 23 is a nozzle forming surface on which a number of nozzles (not shown) for discharging the ink supplied from each ink cartridge 25 are formed. These nozzles are arranged in parallel along the width direction of the recording paper 12 so as to be spaced apart from each other in the conveyance direction of the recording paper 12, thereby providing a plurality of nozzle rows individually corresponding to each ink color. It is composed. Then, the printing process for the recording paper 12 is performed by sequentially ejecting ink from the nozzle rows to the recording paper 12 at a timing in accordance with the conveyance speed of the recording paper 12 conveyed through the gate roller 21. ing. The unit heads 23 are arranged in a zigzag pattern so that parts of the unit heads 23 overlap each other along the width direction of the recording paper 12, and print processing is performed across the entire width direction of the recording paper 12. It is possible.

  Further, in order to promote drying of the recording paper 12 transferred from the gate roller 21 onto the conveying belt 17 at a position substantially in the center in the left-right direction in the belt conveying device 13 and above the conveying belt 17. A heater 26 that can be heated is disposed. The heater 26 is an infrared heater that radiates infrared rays to the recording paper 12, and heats the printing surface of the recording paper 12 to which the ink ejected from the recording head 22 adheres in a non-contact manner.

  A platen 27 serving as a substantially rectangular plate-like support member that supports the recording paper 12 fed through the gate roller 21 is disposed below the unit head 23. That is, the upper surface of the platen 27 that faces the nozzle formation surface of the unit head 23 in the vertical direction functions as a support surface that supports the recording paper 12. In addition, on the upper surface of the platen 27, a long hole 28 having substantially the same shape as the unit head 23 in plan view is located above and below the platen 27 at a position vertically below the unit head 23 in the ink ejection direction. An opening is formed so as to penetrate in the direction (thickness direction of the platen 27). In other words, the long holes 28 are formed in the upper surface of the platen 27 in such a manner that the long holes 28 are partitioned so as to individually correspond to the unit heads 23.

  As shown in FIGS. 2 and 3, below the platen 27, a bottomed substantially rectangular tube-shaped cover member 29 is disposed so as to cover the lower opening of each long hole 28. Further, the bottom wall portion that is downward in the direction of gravity in the cover member 29 is configured to form an inclined surface that is gradually inclined downward in the vertical direction toward the rear side. In the bottom wall portion of the cover member 29, one end side of the waste ink tube 30 is connected to an end portion on the rear side which is the lowest portion in the direction of gravity, and the other end side of the waste ink tube 30 is waste ink. It is inserted into the container 31. In the present embodiment, the waste ink collecting unit for collecting the waste ink (waste liquid) collected in the cover member 29 through the long hole 28 of the platen 27 by the waste ink tube 30 and the waste ink container 31. (Waste liquid recovery unit) is configured.

  In addition, a communication hole 32 is formed in the side wall portion on the rear side of the cover member 29 so as to penetrate the side wall portion in the front-rear direction and communicate with the inside and the outside. The induction blower serving as a suction means through the communication hole 32 33 is connected. And when the suction fan 34 accommodated in the inside is rotationally driven, the induction blower 33 sucks the air in the space surrounded by the cover member 29 and the platen 27 through the communication hole 32 to the outside. Discharge. That is, the space surrounded by the cover member 29 and the platen 27 functions as a negative pressure chamber 35 that generates a negative pressure based on the drive of the induction blower 33.

  Further, when a negative pressure is generated in the negative pressure chamber 35 as the induction blower 33 is driven, the negative pressure similarly acts in the long hole 28 of the platen 27 communicating with the negative pressure chamber 35. Therefore, the long hole 28 of the platen 27 functions as a suction hole that can suck the ink mist staying between the recording head 22 and the platen 27 into the negative pressure chamber 35. In this embodiment, the platen 27, the cover member 29, the waste ink tube 30, the waste ink container 31, and the induction blower 33 collect mist for collecting the ink mist staying between the recording head 22 and the platen 27. A collection device 36 is configured.

  The communication hole 32 is formed at a position spaced upward from the bottom wall portion of the cover member 29, and the induction blower 33 communicates with an upper region in the negative pressure chamber 35 through the communication hole 32. . Further, the induction blower 33 is provided with a filter (not shown) for removing foreign substances contained in the ink mist sucked and discharged from the negative pressure chamber 35 at the connection portion to the negative pressure chamber 35. The foreign matter is prevented from sticking to the suction fan 34 and causing an abnormal operation.

  A sensor 37 for detecting the presence or absence of the recording paper 12 is disposed at the upstream end position of the platen 27 so as to face the upper surface of the platen 27. The sensor 37 is electrically connected to a control device 38 that controls the drive of the induction blower 33, and transmits the detection result to the control device 38.

  The control device 38 determines whether the recording paper 12 is placed on the upper surface of the platen 27 based on the detection result of the sensor 37. Specifically, the control device 38 receives a signal from the sensor 37 indicating that the recording paper 12 has been switched from an undetectable state to a detectable state at the upstream end position of the platen 27. 12, it is determined that the leading end portion (left end portion in FIG. 1) has reached the position of the upstream end of the platen 27, and it is determined that the recording paper 12 has been placed on the upper surface of the platen 27.

  Subsequently, when the control device 38 receives a signal from the sensor 37 indicating that the recording paper 12 has been switched from the detectable state to the undetectable state at the upstream end position of the platen 27, It is determined that the base end portion (right end portion in FIG. 1) in the transport direction has reached the position of the upstream end of the platen 27, and it is determined that the recording paper 12 is continuously placed on the upper surface of the platen 27.

  Next, the control device 38 determines the conveyance speed of the recording paper 12 conveyed via the gate roller 21 and the horizontal dimension of the platen 27 (that is, the positions of the upstream end and the downstream end of the platen 27). The required time until the base end portion of the recording paper 12 in the transport direction reaches the position of the downstream end of the platen 27 is estimated based on the distance between them. Then, when the estimated required time has elapsed, the control device 38 determines that the base end portion in the transport direction of the recording paper 12 has reached the position of the downstream end of the platen 27, and the recording paper 12 with respect to the upper surface of the platen 27. It is discriminated that the placement of is finished.

  Thereafter, when the control device 38 receives a signal from the sensor 37 indicating that the recording paper 12 has been switched from the undetectable state to the detectable state at the upstream end position of the platen 27, In contrast, it is determined that the placement of a new recording paper 12 has started. Thereafter, by repeating the above cycle, it is determined whether or not the recording paper 12 is placed on the upper surface of the platen 27.

  In addition, the control device 38 functions as a suction force adjusting unit that adjusts the suction force that the induction blower 33 acts in the negative pressure chamber 35 based on whether or not the recording paper 12 is placed on the upper surface of the platen 27. . Specifically, when the control device 38 determines that the recording paper 12 is placed on the upper surface of the platen 27, the suction that acts on the recording paper 12 through the long hole 28 of the platen 27. The recording paper 12 is attracted so that the recording paper 12 becomes a suction force (first suction force) capable of maintaining its flatness without being recessed into the negative pressure chamber 35 side through the long hole 28 of the platen 27. The number of rotations of the suction fan 34 disposed in the blower 33 is adjusted. Therefore, ink is ejected from the recording head 22 on the printing surface of the recording paper 12 in a state where the flatness is maintained, so that the printing processing can be performed on the recording paper 12 with high accuracy.

  On the other hand, when the control device 38 determines that the recording paper 12 is not placed on the upper surface of the platen 27, it acts on the area between the recording head 22 and the platen 27 via the long hole 28 of the platen 27. The suction force is set in the induction blower 33 so that the suction force becomes a stronger suction force (second suction force) than when the recording paper 12 is placed on the upper surface of the platen 27. The number of rotations of the suction fan 34 is increased. Therefore, even when a high concentration of ink mist stays between the recording head 22 and the platen 27, a strong suction force acts on the ink mist through the long hole 28 of the platen 27, and a large amount of air flows. By generating the air flow, the ink mist can be reliably collected in the negative pressure chamber 35 in a short time.

  Further, in the printer 11, for example, when there is a gap between the preceding recording sheet 12 and the succeeding recording sheet 12 in the transport direction, and the area that becomes the interval is positioned on the platen 27, the platen 27. There is a case where the recording paper 12 is not placed on the upper surface. In such a case, the control device 38 causes the induction blower 33 to move inside the negative pressure chamber 35 based on whether or not the flushing operation for forcibly discharging the ink thickened from the nozzles of the recording head 22 or the ink mixed with bubbles is executed. It functions as a suction time adjusting means for adjusting the suction time during which the suction force is applied. Specifically, when the flushing operation is performed, the control device 38 has a higher concentration of ink mist in the region between the recording head 22 and the platen 27 than when the flushing operation is not performed. In order to reliably collect the high-density ink mist in the negative pressure chamber 35 through the long hole 28 of the platen 27, the induction blower 33 is connected to the negative pressure chamber 35 and the platen 27. The suction time for applying a suction force to the ink mist through the long hole 28 is increased.

  Further, the control device 38 adjusts the suction time during which the induction blower 33 applies a suction force to the negative pressure chamber 35 according to the printing area of the recording paper 12. Specifically, when the printing area of the recording paper 12 is larger than a preset value, the control device 38 increases the amount of ink ejected from the recording head 22 toward the recording paper 12. Then, it is determined that the amount of ink mist staying between the recording head 22 and the platen 27 is also increased, and in order to reliably collect the increased ink mist in the negative pressure chamber 35, the induction blower 33 is connected to the negative pressure chamber. The suction time during which the suction force is applied to the inside 35 is increased.

Next, the operation of the printer 11 configured as described above will be described.
When ink is ejected from the nozzles of the recording head 22 toward the recording paper 12 placed on the upper surface of the platen 27, the ink is evaporated to form a mist-like ink mist. 27. When the ink mist gradually settles downward according to gravity and adheres to the upper surface of the platen 27, there is a possibility that the non-printing surface of the recording paper 12 conveyed by sliding on the upper surface may be contaminated. . Further, when the ink mist diffuses in the conveyance direction of the recording paper 12 and adheres to the conveyance surface of the conveyance belt 17, the non-printing state of the recording paper 12 conveyed downstream is placed on the conveyance surface. There was a risk of contaminating the printed surface. When the ink mist diffuses in the conveyance direction of the recording paper 12 and adheres to the back surface of the conveyance belt 17, the conveyance belt 17 sticks to the surfaces of the rollers 14 and 15 via viscous ink, There is a possibility of causing an abnormal operation of the belt conveyance device 13.

  In this regard, according to the printer 11 of the present embodiment, the long holes 28 of the platen 27 are formed at positions facing the unit heads 23 in the ink ejection direction. Therefore, after the ink mist is discharged from each unit head 23, the ink mist is sucked from the induction blower 33 along the settling direction in a state where the ink mist is settling according to gravity in the gravity direction which is substantially the same as the discharge direction. Force acts through the slot 28 of the platen 27. Therefore, the air resistance when generating an air flow toward the negative pressure chamber 35 with respect to the ink mist staying between the recording head 22 and the platen 27 is air in a direction crossing the settling direction of the ink mist. It is reduced compared with the case where a flow is generated. Therefore, since the ink mist is sucked into the negative pressure chamber 35 with high efficiency in a short time, the upper surface of the platen 27, the conveying surface of the conveying belt 17, and the rear surface of the conveying belt 17 are hardly contaminated. In addition, since an air flow having a low speed and a large air volume is generated in the ink mist, the air flow hardly affects the flying direction of the ink from the recording head 22, and the print quality on the recording paper 12 is maintained. It is possible.

  When the induction blower 33 is driven, the ink mist staying between the recording head 22 and the platen 27 extends vertically downward into the negative pressure chamber 35 through the long hole 28 of the platen 27. At the same time, an air flow (indicated by a dotted line in FIG. 3) is generated so as to extend in a substantially horizontal direction at a position near the platen 27 in the negative pressure chamber 35. As a result, among the waste ink collected in the negative pressure chamber 35 through the long hole 28 of the platen 27, the ink mist was separated from the liquid waste ink ejected as the waste liquid from the recording head 22. In the state, it is adsorbed by the filter in the induction blower 33.

  Further, in the printer 11 of the present embodiment, during the flushing operation, the ink ejected from the nozzles of each unit head 23 is dropped according to gravity in the gravity direction that is substantially the same as the ejection direction, and then the length of the platen 27 is increased. It passes through the hole 28 and is collected in the negative pressure chamber 35. At this time, the long holes 28 of the platen 27 are formed so as to have substantially the same shape in plan view with respect to each unit head 23, and all of the long holes 28 provided on the lower surface of each unit head 23 on the upper surface of the platen 27. These long holes 28 are arranged at positions facing the nozzles in the vertical direction. Therefore, the ink ejected from each unit head 23 does not collide and scatter on the upper surface of the platen 27, passes through the long hole 28 of the platen 27, and accumulates on the bottom wall portion of the cover member 29. At this time, since the bottom wall portion of the cover member 29 and the platen 27 are sufficiently separated from each other in the vertical direction, the ink that collides with the bottom wall portion of the cover member 29 has a negative pressure through the long hole 28 of the platen 27. It does not scatter outside the chamber 35.

  Further, the liquid waste ink collected in the negative pressure chamber 35 flows downward along the inclined surface of the bottom wall portion of the cover member 29 according to gravity. Then, after being collected at the lower end of the rear side wall portion of the cover member 29, the cover member 29 is collected into the waste ink container 31 through the waste ink tube 30. At this time, since the induction blower 33 is connected to the rear side wall portion of the cover member 29 at a position sufficiently separated in the vertical direction from the lower end thereof, the waste flowing down along the bottom wall portion of the cover member 29 is eliminated. Ink does not enter the filter of the induction blower 33 to cause clogging.

  Further, in the printer 11 of the present embodiment, when performing borderless printing on the recording paper 12 placed on the platen 27 without performing margin printing over the entire width direction of the recording paper 12, The unit head 23 also ejects a small amount of ink to the outside of the paper edge of the recording paper 12. At this time, long holes 28 having substantially the same width as the nozzle rows provided in the unit heads 23 are formed on the upper surface of the platen 27 so as to reach the outside of the paper edge of the recording paper 12. Therefore, the ink ejected from each unit head 23 passes through the outside of the end of the recording paper 12 and is then collected in the negative pressure chamber 35 through the long hole 28 of the platen 27. Accordingly, it is possible to prevent the ink ejected from the unit head 23 from colliding with the upper surface of the platen 27 and scattering, thereby contaminating the paper edge of the recording paper 12.

Therefore, in this embodiment, the following effects can be obtained.
(1) In the above embodiment, the ink mist in which the ink ejected from the nozzles of the recording head 22 is in the form of mist has a suction force from the induction blower 33 along the ejection direction so that the long hole 28 of the platen 27 Acting through. Therefore, the recording head 22 and the platen 27 are compared with the case where the suction force from the induction blower 33 is applied along the conveyance direction of the recording paper 12 through the narrow space between the recording head 22 and the platen 27. By reducing the air resistance when the ink mist staying between them is caused to flow, the ink mist can be sucked at a low speed and a large air volume. Therefore, there is almost no change in the flying direction of the ink ejected from the recording head 22 as the induction blower 33 is driven, and the ink mist generated in the printer 11 is maintained while maintaining the print quality on the recording paper 12. It can be reliably recovered. Further, since the suction force required when the attracting fan 33 sucks the ink mist is reduced, the entire fan can be downsized by replacing the suction fan 34 in the attracting fan 33 with a small and space-saving one. Can be achieved.

  (2) In the above embodiment, the long holes 28 are formed dispersed on the upper surface of the platen 27. Therefore, when the suction force from the induction blower 33 acts on the recording paper 12 through the long hole 28, the printing surface of the recording paper 12 is depressed into the negative pressure chamber 35 side through the long hole 28. By suppressing the printing quality, it is possible to maintain the printing quality for the recording paper 12.

  (3) In the said embodiment, the bottom wall part of the cover member 29 is comprised so that the inclined surface inclined with respect to the horizontal direction may be made, and in the position which becomes the lowest part in the gravity direction in the bottom wall part A waste ink container 31 for collecting the waste ink collected in the negative pressure chamber 35 is connected via a waste ink tube 30. Therefore, when ink is ejected from the nozzle of the recording head 22 into the negative pressure chamber 35 through the long hole 28 of the platen 27, the ink flows downward along the bottom wall portion of the cover member 29. . As a result, the waste ink can be efficiently collected in the waste ink container 31 via the waste ink tube 30 after being collected at a position at the bottom of the bottom wall portion of the cover member 29 in the direction of gravity.

  (4) In the above-described embodiment, the induction blower 33 is connected to a position spaced upward in the direction of gravity from the bottom wall portion of the cover member 29. Therefore, the induction blower 33 is a droplet-like liquid in which the ink mist dispersed in the entire area of the negative pressure chamber 35 out of the waste ink collected in the negative pressure chamber 35 is deposited on the bottom wall portion of the cover member 29. It can be separated and collected from waste ink.

  (5) In the above embodiment, when the recording paper 12 is not placed on the upper surface of the platen 27, the attracting blower 33 is stronger than the suction force when the recording paper 12 is attracted to the upper surface of the platen 27. Since the suction force acts on the ink mist staying between the recording head 22 and the platen 27 through the long hole 28 of the platen 27 so as to obtain the suction force, the ink mist is more efficiently removed from the negative pressure chamber. 35 can be collected.

  (6) In the above-described embodiment, the induction blower 33 has a negative pressure in a state where high-density ink mist stays between the recording head 22 and the platen 27 just after ink is ejected from the recording head 22. The ink mist is reliably collected in the negative pressure chamber 35 by increasing the suction time for applying a suction force to the ink mist through the chamber 35 and the long hole 28 of the platen 27 and increasing the integrated air volume. be able to.

  (7) In the above-described embodiment, the printing area of the recording paper 12 is increased, so that the amount of ink ejected from the nozzles of the recording head 22 to the recording paper 12 is increased. When the amount of ink mist staying between the suction mist and the suction blower 33 increases, the suction time for the suction blower 33 to apply a suction force to the ink mist through the negative pressure chamber 35 and the long hole 28 of the platen 27 is increased. By increasing the integrated air volume, the ink mist can be reliably collected in the negative pressure chamber 35.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment is different from the first embodiment in that a circular hole for collecting ink mist in the negative pressure chamber 35 is formed on the upper surface of the platen 27. Accordingly, in the following description, the same or corresponding member configurations as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIGS. 4 and 5, a plurality of (three in the present embodiment) circular holes 39 are provided in the negative pressure chamber at positions adjacent to each elongated hole 28 in the front-rear direction on the upper surface of the platen 27. Openings are formed so as to penetrate through the platen 27 in the vertical direction (thickness direction of the platen 27) in a manner that the inside and outside of the plate 35 are in communication. When a negative pressure is generated in the negative pressure chamber 35 as the induction blower 33 is driven, the negative pressure similarly acts in the circular hole 39 of the platen 27 communicating with the negative pressure chamber 35. Therefore, the circular hole 39 of the platen 27 functions as a mist suction hole that can suck the ink mist staying between the recording head 22 and the platen 27 into the negative pressure chamber 35.

  Further, in the bottom wall portion of the cover member 29, an insertion hole 40 having substantially the same shape in plan view as the long hole 28 of the platen 27 is provided at a position corresponding to the long hole 28 of the platen 27 in the vertical direction. Are respectively formed so as to penetrate through the top and bottom. In these insertion holes 40, a maintenance unit 41 as a liquid receiver having a bottomed substantially square cylindrical shape capable of receiving ink ejected as waste ink from each unit head 23 has an opening at the unit head 23. It is inserted through each side. A seal member (not shown) is disposed at the end edge of these insertion holes 40 so as to surround the outer peripheral surface of the maintenance unit, and the maintenance unit 41 maintains the airtightness in the negative pressure chamber 35. In this state, it is inserted into the insertion hole 40.

  Further, a substantially rectangular plate-like connecting member 42 is connected to the lower end of each maintenance unit 41 so that its longitudinal direction is along the horizontal direction. Each maintenance unit 41 is integrated with the connecting member 42 in the up and down direction. In addition, an eccentric cam 43 serving as a substantially elliptical displacement mechanism that raises and lowers each maintenance unit 41 in the vertical direction via the connecting member 42 is disposed below the connecting member 42.

Next, the operation of the printer 11 configured as described above will be described with reference to FIGS.
As shown in FIG. 5A, when the eccentric cam 43 is arranged so that its longitudinal direction is along the horizontal direction, the connecting member 42 is supported on a side surface along the longitudinal direction of the eccentric cam 43. . At this time, the opening of each maintenance unit 41 is disposed in the negative pressure chamber 35 at a position (first position) spaced downward from the opening edge of the long hole 28 of the platen 27. Therefore, when the induction blower 33 is driven, the ink mist staying between the recording head 22 and the platen 27 extends vertically downward into the negative pressure chamber 35 through the long hole 28 of the platen 27. At the same time, an air flow (indicated by a dotted line in FIG. 5A) is generated so as to pass through the gap between the platen 27 and the maintenance unit 41 and extend substantially in the horizontal direction. At the same time, the ink mist has a curved air that extends vertically downward into the negative pressure chamber 35 through the circular hole 39 of the platen 27 and extends substantially in the horizontal direction at a position near the platen 27. A flow (indicated by a dotted line in FIG. 5A) is generated. In other words, the suction force acts on the ink mist through both the long hole 28 and the circular hole 39 of the platen 27, thereby reducing the air resistance when generating an air flow toward the negative pressure chamber 35. Thus, the ink mist can be collected in the negative pressure chamber 35 with high efficiency in a short time.

  In addition, as shown in FIG. 5B, when the eccentric cam 43 rotates counterclockwise around the axis of the shaft portion 44, the longitudinal rear end portion of the eccentric cam 43 becomes the shaft portion 44. On the other hand, by displacing rearward and obliquely upward, the lower surface of the connecting member 42 is pressed and displaced upward. Then, in conjunction with the displacement of the connecting member 42, each maintenance unit 41 slides upward along the edge of the insertion hole 40 of the cover member 29, so that the opening portion of the long hole 28 of the platen 27 is formed. It arrange | positions in the position (2nd position) which adjoins with respect to an opening edge. As a result, the interval between the unit head 23 and the maintenance unit 41 is narrowed, so that the ink ejected from each unit head 23 during the flushing operation is opened through the long hole 28 of the platen 27. It is surely collected in the part.

  In this case, since the gap between the opening edge of the long hole 28 of the platen 27 and the maintenance unit 41 is narrowed, the air when the air flow through the long hole 28 of the platen 27 is generated to the ink mist. Resistance increases. In this regard, in the printer 11 of the present embodiment, a circular hole 39 is formed on the upper surface of the platen 27 at a position different from the long hole 28 where the maintenance unit 41 contacts and separates. Therefore, the air resistance when the air flow through the circular hole 39 of the platen 27 is generated with respect to the ink mist is hardly affected by the vertical arrangement of the maintenance unit 41. In other words, the suction force acts on the ink mist through both the long hole 28 and the circular hole 39 of the platen 27, so that the negative pressure is reduced as compared with the case where only the long hole 28 is formed on the upper surface of the platen 27. The air resistance at the time of generating an air flow toward the chamber 35 is reduced. Accordingly, in parallel with the flushing operation, the ink mist staying between the recording head 22 and the platen 27 can be collected in the negative pressure chamber 35 with high efficiency, and the throughput of the entire apparatus required for collecting the ink mist. Can be reduced.

  Further, as shown in FIG. 5C, when the eccentric cam 43 is further rotated counterclockwise around the axis of the shaft portion 44 and the longitudinal direction thereof is arranged along the vertical direction. The longitudinal tip portion of the eccentric cam 43 is displaced vertically upward with respect to the shaft portion 44, whereby the lower surface of the connecting member 42 is pressed and displaced further upward. Then, in conjunction with the displacement of the connecting member 42, each maintenance unit 41 has its opening passing upward through the long hole 28 of the platen 27 so as to surround the nozzle against the lower surface of each unit head 23. It arrange | positions in the position (3rd position) which touches. Each maintenance unit 41 generates negative pressure in a space sealed between the unit head 23 and the maintenance unit 41, thereby causing ink thickened from the nozzles of the unit head 23 or ink mixed with bubbles to be generated. A cleaning operation for sucking and discharging is performed.

  At this time, the long hole 28 of the platen 27 is sealed with almost no gap by inserting the maintenance unit 41. Therefore, it becomes difficult to collect the ink mist in the negative pressure chamber 35 through the long hole 28 of the platen 27. In this respect, in the printer 11 of the present embodiment, a circular hole 39 is formed on the upper surface of the platen 27 at a position different from the long hole 28 through which the maintenance unit 41 is inserted and removed. Therefore, in parallel with the cleaning operation, the ink mist staying between the recording head 22 and the platen 27 can be collected in the negative pressure chamber 35 through the circular hole 39 of the platen 27. Throughput of the entire apparatus required for collection can be reduced.

Therefore, in this embodiment, the following effects can be obtained in addition to the effects (1) to (7) of the first embodiment.
(8) In the above embodiment, the circular hole 39 for sucking ink mist into the negative pressure chamber 35 is formed on the upper surface of the platen 27 at a position facing the nozzle in the direction of ink ejection from the recording head 22. It is formed at a position different from the elongated hole 28 formed. Therefore, even when the long hole 28 of the platen 27 is sealed, the ink mist staying between the recording head 22 and the platen 27 enters the negative pressure chamber 35 via the circular hole 39 of the platen 27. It is collected. Therefore, the maintenance unit 41 can be arranged so as to pass through the long hole 28 of the platen 27 so as to be in contact with and away from the nozzle forming surface of the recording head 22, and the degree of freedom in designing the printer 11 can be increased. it can.

  (9) In the above embodiment, the eccentric cam 43 has the recording head when the maintenance unit 41 is disposed at a position where the distance between the opening of the maintenance unit 41 and the nozzle forming surface of the recording head 22 is relatively small. It is possible to suppress contamination of the inside of the printer 11 by the ink ejected as waste ink from the 22 nozzles colliding with the bottom surface of the opening of the maintenance unit 41 and scattering. On the other hand, when the maintenance unit 41 is arranged at a position where the distance between the opening of the maintenance unit 41 and the opening edge of the long hole 28 of the platen 27 is relatively large, the eccentric cam 43 has the long hole 28 of the platen 27. Therefore, the flow path resistance of the ink mist flowing into the negative pressure chamber 35 through the gap is reduced. Therefore, the induction blower 33 can more efficiently collect the ink mist staying between the recording head 22 and the platen 27 by sucking the high air volume ink mist through the long hole 28 of the platen 27. it can.

In addition, you may change each said embodiment into another embodiment as follows.
In each of the above embodiments, as shown in FIG. 6, the outer peripheral surface is a cylindrical surface without unevenness as a transport mechanism for transporting the recording paper 12 that has been subjected to the printing process on the platen 27 to the downstream side. A substantially cylindrical transport driving roller 46 having a built-in heater 45 as a heating means capable of heating the recording paper 12 to promote drying, and a position facing the transport driving roller 46 in the vertical direction. It is also possible to employ a transport roller pair 48 that is configured by a substantially cylindrical transport driven roller 47 that is disposed in the outer peripheral surface and has a large number of external teeth formed on the outer peripheral surface thereof.

  In general, when the recording paper 12 is heated at a position near the upper surface of the platen 27, the water contained in the recording paper 12 evaporates to become water vapor and stays between the recording head 22 and the platen 27. The water vapor may cause bleeding on the printing surface of the recording paper 12 immediately after the printing process is performed on the upper surface of the platen 27. In this regard, in this configuration, the induction blower 33 immediately sucks water vapor into the negative pressure chamber 35 through the long hole 28 of the platen 27, so that the print quality of the recording paper 12 is prevented from deteriorating and the recording paper is suppressed. Twelve printed surfaces can be quickly dried. Further, in this configuration, the conveyance driven roller 47 reduces the contact area by bringing the tips of the external teeth into point contact with the recording paper 12, thereby preventing the printing surface of the recording paper 12 from being disturbed. The paper 12 can be driven to rotate.

  In the second embodiment, the mist suction hole for collecting the ink mist in the negative pressure chamber 35 faces the nozzle in the direction of ink ejection from the unit head 23 on the upper surface of the platen 27. As long as the position is different from the position, the opening may be formed at an arbitrary position. The shape of the mist suction hole is not limited to a circular shape, and may be an arbitrary shape.

In each of the above-described embodiments, a waste ink absorbent for absorbing waste ink may be disposed at the bottom wall portion of the cover member 29 at the lowest position in the direction of gravity.
In each embodiment described above, the bottom wall portion of the cover member 29 may be configured along the horizontal direction.

  In each of the embodiments described above, the suction holes for collecting the ink mist in the negative pressure chamber 35 may be arranged so that the suction holes are arranged to face the unit heads 23 on the upper surface of the platen 27. Any arrangement may be used. The shape of the suction hole is not limited to a rectangular shape, and may be an arbitrary shape.

  In each of the above embodiments, the unit heads 23 may be arranged arbitrarily above the platen 27. In this case, suction holes are arranged on the upper surface of the platen 27 so as to face the unit heads 23 in accordance with the arrangement of the unit heads 23. Moreover, the planar view shape of the unit head 23 is not limited to a rectangular shape, and may be an arbitrary shape.

In each of the above embodiments, the recording head 22 may be configured by a single unit head 23.
In each of the above embodiments, the recording head 22 may be disposed to face the platen 27 so as to be along the horizontal direction. In this case, a suction hole for sucking the ink mist staying between the recording head 22 and the platen 27 is formed on the side surface of the platen 27 facing the nozzle forming surface of the recording head 22.

  In each of the above embodiments, a liquid ejecting apparatus that ejects or ejects liquid other than ink may be employed as the liquid ejecting apparatus. The present invention can be used for various liquid consuming devices including a liquid ejecting head that discharges a minute amount of liquid droplets. In addition, a droplet means the state of the liquid discharged from the said liquid ejecting apparatus, and shall also include what pulls a tail in granular shape, tear shape, and thread shape. Moreover, the liquid here may be a material that can be ejected by the liquid consuming apparatus. For example, it may be in the state when the substance is in a liquid phase, and may be in a liquid state with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts) ) And a liquid as one state of the substance, as well as particles in which functional material particles made of solid materials such as pigments and metal particles are dissolved, dispersed or mixed in a solvent. In addition, as a typical example of the liquid, the ink described in the above embodiment can be used. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot-melt inks. As a specific example of the liquid consuming device, for example, a liquid containing a material such as an electrode material or a color material used for manufacturing a liquid crystal display, an EL (electroluminescence) display, a surface emitting display, a color filter, or the like in a dispersed or dissolved form. It may be a liquid ejecting apparatus for ejecting, a liquid ejecting apparatus for ejecting a bio-organic material used for biochip manufacturing, a liquid ejecting apparatus for ejecting a liquid as a sample used as a precision pipette, a textile printing apparatus, a microdispenser, or the like. In addition, transparent resin liquids such as UV curable resin to form liquid injection devices that pinpoint lubricant oil onto precision machines such as watches and cameras, and micro hemispherical lenses (optical lenses) used in optical communication elements. A liquid ejecting apparatus that ejects a liquid onto the substrate or a liquid ejecting apparatus that ejects an etching solution such as acid or alkali to etch the substrate or the like may be employed.

Hereinafter, technical ideas other than the invention described in the claims that can be grasped from the above embodiment will be additionally described.
Technical idea (1): In the mist collecting apparatus according to any one of claims 1 to 7,
A suction time adjusting means for adjusting the suction time of the suction means for the negative pressure chamber;
The suction time adjusting means includes
When the liquid is ejected from the nozzle of the liquid ejecting head, the suction time of the suction means is increased as compared with the case where the liquid is not ejected from the nozzle of the liquid ejecting head. A featured mist collection device.

  According to the above configuration, in a state where a large amount of mist stays between the liquid ejecting head and the support member just after the liquid is ejected from the nozzle of the liquid ejecting head, the suction time of the suction unit is increased. By increasing the integrated air volume, mist can be reliably recovered.

Technical idea (2): In the mist collecting apparatus described in technical idea (1),
The suction time adjusting means adjusts the suction time of the suction means based on the print area of the target so that the suction time is longer when the print area is large than when the print area is small. A featured mist collection device.

  According to the above configuration, the amount of liquid ejected from the nozzle of the liquid ejecting head to the target is increased by increasing the printing area of the target, and accordingly, the amount of mist staying between the liquid ejecting head and the support member. Is increased, the mist can be reliably recovered by increasing the suction time of the suction means and increasing the integrated air volume.

Technical idea (3) ... In the liquid ejecting apparatus according to claim 8,
The liquid ejecting apparatus according to claim 1, further comprising a heating unit configured to heat the target at a position near the support surface.

  When the target is heated in the vicinity of the support surface of the support member, the water contained in the target evaporates to become water vapor and stays between the liquid jet head and the support member. There is a possibility that bleeding occurs on the printing surface of the target immediately after the printing process is performed on the support surface of the member. In this regard, according to the above configuration, the suction unit immediately sucks water vapor into the negative pressure chamber through the suction hole, so that the print surface of the target is quickly dried while suppressing the deterioration of the print quality of the target. be able to.

1 is a schematic front view illustrating a printer according to a first embodiment. The top view which shows the mist collection | recovery apparatus of 1st Embodiment. FIG. 3 is a cross-sectional view taken along line 2-2 in FIG. 2. The top view which shows the mist collection | recovery apparatus of 2nd Embodiment. 4A is a cross-sectional view taken along line 4-4 in FIG. 4 during ink mist suction, FIG. 4B is a cross-sectional view taken along arrow 4-4 in FIG. 4 during flushing, and FIG. 4C is a view taken in FIG. 4-4 arrow sectional drawing. The schematic front view which shows the printer of another embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Printer as liquid ejecting apparatus, 12 ... Recording paper as target, 22 ... Recording head as liquid ejecting head, 23 ... Unit head, 27 ... Platen as supporting member, 28 ... Long hole as suction hole, 33 ... Attracting blower as suction means, 30 ... Waste ink tube constituting the waste liquid collecting section, 31 ... Waste ink container constituting the waste liquid collecting section, 35 ... Negative pressure chamber, 36 ... Mist collecting device, 38 ... Suction force adjusting means And a control device as a suction time adjusting means, 39 ... a circular hole as a mist suction hole, 41 ... a maintenance unit as a liquid receiver, 43 ... an eccentric cam as a displacement mechanism, 45 ... a heater as a heating means.

Claims (8)

A mist collecting device provided in a liquid ejecting apparatus including a liquid ejecting head that ejects liquid from a nozzle formed on a nozzle forming surface to a target,
A support member which is disposed so that a support surface capable of supporting the target is opposed to the nozzle forming surface, and a suction hole capable of generating a negative pressure when sucked is formed on the support surface. When,
A negative pressure chamber communicating with the suction hole of the support member;
By generating a negative pressure in the negative pressure chamber, mist generated between the liquid jet head and the support member based on the liquid jet from the nozzle is sucked into the negative pressure chamber through the suction hole. And suction means for
The suction hole is formed on the support surface so as to open at a position facing the nozzle in the liquid discharge direction from the nozzle. In the mist collection | recovery apparatus of Claim 1,
The liquid ejecting head includes a plurality of unit heads arranged in a staggered manner so as to face the support surface of the support member,
The mist collecting device according to claim 1, wherein the suction hole is formed in the support surface of the support member so as to be partitioned so as to individually correspond to the plurality of unit heads. In the mist collection | recovery apparatus of Claim 1 or Claim 2,
The negative pressure chamber is configured such that a bottom wall portion positioned below in the direction of gravity is inclined with respect to the horizontal direction,
A mist collecting apparatus, wherein a waste liquid collecting unit for collecting the liquid sucked into the negative pressure chamber is provided at a position at the bottom of the bottom wall in the direction of gravity. In the mist collection | recovery apparatus as described in any one of Claims 1-3,
The mist collecting device according to claim 1, wherein the suction means communicates with an upper region in the gravity direction in the negative pressure chamber. In the mist collection | recovery apparatus as described in any one of Claims 1-4,
A mist suction hole for sucking the mist into the negative pressure chamber communicates with the nozzle in the discharge direction of the liquid from the nozzle on the support surface of the support member. A mist collecting device, wherein an opening is formed at a position different from a position facing the mist collecting apparatus. In the mist collection | recovery apparatus of Claim 5,
The liquid ejecting head has an opening disposed so as to face the nozzle, and is capable of receiving the liquid discharged as waste liquid from the nozzle of the liquid ejecting head through the opening, And a liquid receiver that is displaceable in a direction of passing through the suction hole from the negative pressure chamber and coming into contact with and separating from the nozzle forming surface of the liquid jet head;
The liquid receiver has a first position where the opening seals the nozzle of the liquid ejecting head, the liquid ejected from the nozzle of the liquid ejecting head, and the suction hole. Between the second position spaced from the liquid ejecting head to the negative pressure chamber side with respect to the opening edge and the third position spaced from the liquid ejecting head to the negative pressure chamber side with respect to the second position. And a displacement mechanism for displacing the mist. In the mist collection | recovery apparatus as described in any one of Claims 1-6,
A suction force adjusting means for adjusting the suction force of the suction means with respect to the negative pressure chamber;
The suction force adjusting means is
When the target is disposed on the support surface of the support member, a suction force applied to the target through the suction hole is a first suction force capable of maintaining the flatness of the target. While adjusting the suction force of the suction means to become,
When the target is not disposed on the support surface of the support member, the suction force of the suction means is adjusted so that the second suction force is stronger than the first suction force. A featured mist collection device. A liquid ejecting head that ejects liquid from a nozzle formed on a nozzle forming surface to a target;
A liquid ejecting apparatus comprising: the mist collecting apparatus according to claim 1.

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